Device for removing tires from molds



`R. N.v\/AN BUSKIRK.

DEVICE FORBEMOVING "HRES FROM MOLDS. APPLICATION FILED JAN. H; 1922.

pfg@ y Y PatentedJune 6,1922,

noemen'. van Bosman, or mirroir, rammelen, assreivon To MORGAN a WRIGHT,

e consomation or incrementi.

- DEVICE rca nai/rovine Trans raciti Momie.

heisses.

. Kinn, a citizen of the United States, resid- 4 from Molds, of which the following is a..

ing at Detroit, in the county of Wayne and State of Michigan, have invented a certain new and useful Device for Removing Tires full, clear, and exact description.

This invention relates to apparatus for facilitating the manufacture ,of tires, and more particularly' to a mold opener. This application is a continuation-impart of my prior application Serial No. 458,992, filed` -April 6th, 1921.

The casin'gs of pneumatic tires, after sides supported either on a metallic core or by internal fluid pressure. 4ln the Ylatter case, the margins oi beads ofthe casing are mounted on a bull ring, and scaled thereon by the confining molds sections with or Without a strip of rubber. After curing, the mold sections and `core or bull ring are re-` moved. Tn all cases, but especially when the tread is shaped with knobs, grooves and the like, ditliculty is encountered in removing the mold sections fromthe cured casing. ln large size lmobby treads, for instance, it is not infrequently necessary to employ four or -iive nien to wrest-the sections apart.

` The present invention relates to a powern operable device for opening sectional tire molds with tacility and .less arduously.

` Essentially the invention consists in prov viding members engageable with separate mold sections and shiftable to forcibly pull them apart.

The invention is illustrated in the accoin panying drawings in which:

Fig. l is a plan view of the apparatus in Working relation to a mold.

Fig. 2 is a vertical cross-section thereof, showing the upper moldsection about to be removed. Y

Fifi'. 3 is a similar vertical section showing the tire and its supporting section being removed from the lower section of the mold. Figs. 4l and 5 are views.similar to Figs.

2 and 3 of a modified form of the invenln the drawings the tire is illustrated as being mounted on a bull or sealing ring 2 and confined between the :opposed coinplementary sections 3 and elof a well-known type of sectional mold. The bull ring 2 is Speccationof Letters Patent. Patented June Application filed Januarylll, 1922.- Serial No. 528,379.

e, ieee.

provided at its inner peripheryiwith a set of spaced lugs 5 and the outer ysections 3 and' 4.- of the mold are likewise provided with setsof projections 6 and 7, respectively, which in use are arranged in pairs opposite or in registration with one another.

One `form of the mold opening device, see/Figs. 1 to 3, comprises a cylinder 8 provided in its head with an apertured ear 9 for suspension in any suitable manner, asby a cable depending from a-travelling hoist (not shown) overhead on the ceiling Iof the press room4 above a table or conveyor, and in the latter case parallel its run; Through a valve 10 fluidunder pressure, fsuch as air lor water, and preferably the latter, may be suitably supplied to the opposite ends of the cylinder to reciprocate a piston 1'1 having a depending piston rod' 124g On the lower end of the piston rod and swiveled for anou- 7= lar movement relative thereto is a mem )er indicated generallyby the numeral 13 having appliirality of arms 14. `The pluralarmed memberl 13 is preferably made in one piece and demountably secured to vrod 12 by a. nut 15 so that it may be supplanted .by other members 13, each having arms of the properlength to engage a set of projections on the inner periphery of other molds of'different size.

For engaging a set of projections on another section of the mold. at the same time a plurality of struts 16 aiefprovided, and preferably, as shown, these are hinged at 17 tothe upper end of the cylinder`8. Preferably. hut-not necessarily., bolts 18, hinged tothe cylinder at 19, are passed loosely throughthe struts 16 which bythe nuts 20 they adjustably confine. In this way, the

sti-nts may be shifted to engagel aset of the 9 periphery of vari- 14 have been lowered belowtlie lugs G on 105 the upper mold sect-ion, movement of the piston 11 is halted and the arms 14 swung underneath the projections 6. Then the 'pis-Yn ton 11 is rerersely operated to forcibly separate the upper mold section from the tire, 110

5 of the bull 100 :is illustrated in dotted lines in Fifi'. 2. ln any suitable manner, tlie upper mold section me); be removed or` cleared from the device. Then tlie bull ring carrying the tire muy bo removed from tbe lower mold section liv repeat-ing tbe steps above men tioiied. j

in 'F 4 und i of tlie drawings, l lieve illustrated iiiodificiition ot die inventionin which tbe struts 1,6 ere provided vvitli notches 2l. The member 13 with its arms 14 is preferablyu but not necessarily, swiveled, es previousiy described, to tbe piston` rod l2, but is confined against substantiel movement. lei'igtbivise the piston-rod between tl'ie nut l5 and. collar Q2 suitably secured to tbe rod iii, es by pinning, sliouldering, or shrinking, thereto. `Witb this modied form of construction, zitter engagingA the notches 2l ot tbe struts lli in tlie projections 6 on the intermediate mold section, tbe up per and j wer mold sections may be Seperated without further manipulation or 2idjustmeiit b v admit-tbm; fluid first to one side and tlien to tlie other side of tbe pistou. Figs. :ind slioiv clearly bow this is done.

rllie device, in eitber torni, esi'iecielljv advantageous for use with i coi'iveyor on Wliicli the molds moy lie supported and opened Wliile movingr but tlie nuiiiner ot supporting tlie molds is obviously immaterial, ii table, for instance, muy be employed.

The invention not limited to the precise details oi coiistruotioii sliowii `and described. The pluriiliirmed member 'i3 may be fixed instead oi'' swii'eied to tlio piston-rod l2, their turoinfwr being eii'ected by turning the pistonfrod in its buslicd journal. sets oi members i3 mig it be on'ijiloyed to simultaneously scjiiirzite tlie sections :ind free botli sides oi tbe tire casing. Preferably, tbe cyr, 9 on tiie cylii'ider bend is connected to ai supporting faible or cliziin by ii swivel "for 't'zicilitziti'niiy rotation oi' tlie cylinder i about its zixis.l Ulivionsly,v tlie device muy lie used i'or ieiiiovinu 'tine outer sections of tbc niold from tiic tire wlietlier the liitter lio iiiouiiled on :i bull ring, es shown, or on n. coro. For iin understiinding;` ol tlic .scopo ol llio invention reference siiould tliercl'iiiie lio unido to 'Llio zicconipunying clziiiiis iii wliicii ilu torni sections o1' mold seizlionsil is iiitciuled to coiiijireliond eii'lior :i bull ring` or ii core functionally 'tlie lutter also participate iii tlio shaping' ot' portions oil ai tires siiii'iico.

Having' tlins do cd in); invention, wluit cliiiiii und desire to protect b v Letters ziteifit l Vin e device im' opening! annuler molds wliosrsections lizivo,projections on tlieir iii-:'iolicries:in coiiiliiiiiiiioii` :i fluid pressure dcvicc conigiiisiug` u igi'liiidoriiiid piston operable licroiiu :ind sets ot members com iiccicd rcsjuwtivciv to uid cylinder und ins- Tb ree f ton for engaging' the projections on separate mold sections. l

ln e device for opening annuler molds whose sections have j'irojections on their periplieries, in combination, iit leest two sets of members for engaging projections on sentirete sections ot' tbe mold, :i cylinder to .wl'iicli one set of members `:ire articulated, :i

piston operable therein rind operatively connected to ziiiotlier eet of members whereby upon the admission of fluid under pressure to tbe cylinder one set of members may be moved relative to tbe other in the direction of tbe axis oli/tbe mold.

3. In e device io/r opening annular molds whose sections bave projections on ,their perijiberies, in combination, two sets of members 'for engaging a plurnlit-y projections on separate sections of a mold, :i cylinder, and :i piston operable therein, said sets of projections being operatively connected to sind piston end cylinder respectively, at leest one of said sots oi' members l'ieiiig adopted to support tlie cylinder in suliistzintizilly cosaxizil relation witl'i tbe mold.

Il. .ln ai device for opening annuler molds whose sections liiive Iprojections on their inner peripberies, in roiiiliiiizitioii, members for engaging projections on separato sections of tlie molds` y:i (.fylinder adapted to be supplied with fluid under pressure, :i piston operable in sind cylinder, a; pisto1iro l, a` member boring arms adopted. to be engaged with projections on tbe molds, said member being mounted on the piston rod :ind rotatable about the axis of tbe cylinder, :ind struts secured to die cylinder and adapted to be engaged witli projections on iiiiotl'ier mold section to cooperate with seid arms in opening ii mold. j l

ln iiy device tor opening annular molds wlioso sections lieve projections on their inner periplieries, in combination, zicylinder und piston operable therein by fluid under pressure, struts secured to tbe cylinder ziiid extending' in the general direction ot its `axis und adopted to support tbe cylinder, :i meniber liziviug e plurality oi' :ii-ms for engaging tbe proji-ictions ou :i mold section, und :i swiveled connection between siiid 'piston and member for facilitating location ot its arms in or out of eugizigeiiient with the projections on the mold.

G. In ii. device for openingi annular molds wliose sections ezicli lieve projections oii their iiineigperiplieries, in combination, ii cylinder :idiijited to be supplied with fluid under pressure, members hinged :it one end to siiid cylinder und adjustable about tlieir hinges toufierijiiit engaging tlieir outer ends with o series o? projections on one section oi tlie mold, ai piston ojicrzible in siiid cylinder, :ind 'einomber having iiy plurality ot iirnis operatively onneoted with tlie piston and mevable `thereby relative te the first mentioned members in the direction of the axis of the mold for separating its Sections.

7. In e device for ripening annular molds whese sections have sets of projections en their inner peripberies, in e0mbinatien,`

members adapted te engage e set ei' prejeetiens en one mold section, e member lniving a plurality ef arms adui'itefl te be engaged with a, eet of projections en :in adjacent mold section, seid lest named member beinel `rottable in the plane el' its extent, and

means for mevingr the lust numeri member axially ei' the first named members te separate the meid sections.

8. A device for Opening tbreeqmrt annularmolds wlioee'euter and intermediate seetionfs ere provided with projections@ en their inner periplieries having inv eombmetion,

'e member for engaging a projection on the intermediate section, means for engaging projections en the outer sections, e cylinder to which the member is connected, endy a piston operable within the Cylinder and eennected te seid means where y upon the udinissien of liuid 'under pressure vte the cylinder the seetiens 0i a mold may be separated.

Signed at; Betreit, county ef Wayne, State of Michigan, this 5th dey of January, 1922.

ROBERT N. VAN BUSKIRK. 

